Self powered
A tachometer using solid state and/or vacuum tube circuitry.
NSN 5910-01-579-2614
NSN 5855-01-553-3368
NSN 6105-00-104-4895
NSN 5965-01-579-0668
NSN 5990-00-518-0684
NSN 5935-00-383-3535
NSN 5925-00-646-3137
NSN 5950-01-459-9164
NSN 2925-01-434-2502
NSN 6130-00-583-3849
NSN 5925-00-227-0396
NSN 5925-00-823-6138